The invention relates to the field of submarine detection, in particular to a precision detection vehicle for submarine natural gas hydrate mineral resources. The precision detection vehicle comprisesa floating cabin body, an inflatable floating body, a methane sensor, and a first regulator and a second regulator, which are symmetrically arranged on both outer sides of the floating cabin body, wherein the inflatable floating body is arranged at the top of the floating cabin body, the methane sensor is arranged at the bottom of the floating cabin body, the first regulator comprises a first draught member and a second draught member, which are symmetrical to each other, the second regulator comprises a third draught member and a fourth draught member, which are symmetrical to each other, both of the first draught member and the third draught member correspond to a front end of the floating cabin body, the both of the second draught member and the fourth draught member correspond to a rear end of the floating cabin body, a first oil driving device and a second oil driving device are symmetrically arranged in the floating cabin body, the first oil driving device is in transmission connection with the first draught member and the third draught member, and the second oil driving device is in transmission connection with the second draught member and the fourth draught member. The precision detection vehicle provided by the invention can perform depth regulation at the seabed within a certain range, thereby further improving the detection range.