Vehicle-mounted one-way ratchet wheel type jack

A vehicle-mounted one-way ratchet wheel type jack comprises a base, wherein a connecting rod is arranged on the base, an ejector block is installed at the top end of the connecting rod, a screw rod is arranged on the connecting rod, the left end of the screw rod is connected with the connecting rod in a threaded fit mode, a ratchet wheel is fixedly installed at the right end of the screw rod, a handle is arranged on the ratchet wheel, a pawl which is used for clamping the outer teeth of the ratchet wheel and pushing the ratchet wheel to rotate when the handle rotates is arranged on the handle, and a fast handle is arranged on the outer side of the ratchet wheel and is inserted in the right end of the screw rod. The vehicle-mounted one-way ratchet wheel type jack has the advantages that the structure is reasonable, using is convenient, a weight can be jacked up only by rotating and operating the handle by small angles multiple times, and then the angle of the operation range is reduced, operation is convenient and smooth, labor is saved, the using effect is good, and popularization is easy.