美国各类签证申请类别及所需条件
| Purpose of Travel to U.S. and Nonimmigrant Visas | Visa Type | Required: Before Applying for Visa* |
| Athletes, amateur & professional (compete for prize money on |
B-1 | (NA) |
|
Au pairs (exchange visitor) |
J | SEVIS |
| Australian professional specialty | E-3 | DOL |
| Border Crossing Card: Mexico | BCC | (NA) |
| Business visitors | B-1 | (NA) |
| Diplomats and foreign government officials | A | (NA) |
| Domestic employees or nanny -must be accompanying a foreign national employer | B-1 | (NA) |
| Employees of a designated international organization, and NATO | G1-G5, NATO | (NA) |
| Exchange visitors | J | SEVIS |
| Foreign military personnel stationed in the U.S. | A-2 NATO1-6 |
(NA) |
| Foreign nationals with extraordinary ability in Sciences, Arts, Education, Business or Athletics | O | USCIS |
| Free Trade Agreement (FTA) Professionals: Chile, Singapore | H-1B1 | DOL |
| International cultural exchange visitors | Q | USCIS |
| Intra-company transferees | L | USCIS |
| Medical treatment, visitors for | B-2 | (NA) |
| Media, journalists | I | (NA) |
| NAFTA professional workers: Mexico, Canada | TN/TD | (NA) |
| Nurses coming to health professional shortage areas | H1-C | USCIS |
| Performing athletes, artists, entertainers | P | USCIS |
| Physician | J, H-1B | SEVIS |
| Professor, scholar, teacher (exchange visitor) | J | SEVIS |
| Religious workers | R | (USCIS) |
| Specialty occupations in fields requiring highly specialized knowledge | H-1B | DOL then USCIS |
| Students: academic, vocational | F, M | SEVIS |
| Temporary agricultural workers | H-2A | DOL then USCIS |
| Temporary workers performing other services or labor of a temporary or seasonal nature. | H-2B | DOL then USCIS |
| Tourism, vacation, pleasure visitors | B2 | (NA) |
| Training in a program not primarily for employment | H-3 | USCIS |
| Treaty traders/treaty investors | E | (NA) |
| Transiting the United States | C | (NA) |
| Visa Renewals - Available in the U.S. | (NA) |
*What the abbreviations (above) mean:
Before applying for a visa at a U.S. Embassy abroad the following is required:
DOL = The U.S. employer must obtain foreign labor certification from the U.S. Department of Labor, prior to filing a petition with USCIS.
USCIS = DHS, United States Citizenship and Immigration Services (USCIS) must approve a petition, filed by the U.S. employer (or U.S. citizen, for fiancé petitions)
SEVIS = Program approval entered in the Student and Exchange Visitor Information System (SEVIS)
(NA) = Not Applicable - Means that additional approval by other government agencies is not required prior to applying for a visa at the U.S. Embassy abroad.
Note: Canadian NAFTA Professional workers- Visa not required, apply to CBP at border port-of-entry.
Imp
This chart includes more frequently used types of nonimmigrant visas and the associated purpose of travel with links to relevant webpages. However, it should be noted this chart is not a complete list of all purposes of travel or types of nonimmigrant visas. For additional information, see Nonimmigrant Visa Classifications on the USCIS website. Each visa applicant must meet the eligibility requirements for the type of visa for which he/she is applying, as determined by the consular officer at the U.S. Embassy or Consulate, following U.S. immigration laws. See more detailed information in our temporary visitor webpages.