Clamping device convenient to acquire by oneself

The utility model relates to a centre gripping auxiliary device discloses a clamping device convenient to acquire by oneself, including fixing base, clamping device body and connecting the movable connecting rod between fixing base and clamping device body, the fixing base includes: the sleeve is including setting up rotary mechanism outside the sleeve, locating in the sleeve and by rotary mechanism driven swing arm and set up the cell body on the sleeve lateral wall, clamping part, clamping part include first clamping part and second clamping part, form the centre gripping mouth between first clamping part and the second clamping part, first clamping part with sleeve relatively fixed, the second clamping part is established including the cover snap ring on the swing arm and with the snap ring connect and stretch out in the second clamping part body of cell body, the snap ring with the swing arm passes through threaded connection. Its simple structure, the steadiness is good.