Formaldehyde detector

The invention discloses a formaldehyde detector which comprises a spectrophotometer, the spectrophotometer comprises a shell and a detection box arranged in the shell, and a clamping mechanism used for clamping a test tube, a swing mechanism used for driving the test tube to swing and a detection mechanism used for detecting the absorbance of a formaldehyde reaction solution are arranged in the detection box; the clamping mechanism comprises two clamping plates and a driving assembly for driving the two clamping plates to move in the opposite or opposite directions, the opposite sides of the two clamping plates are rotationally connected with clamping half tubes, the two clamping half tubes are oppositely arranged, and after the two clamping half tubes clamp a test tube, the swing mechanism drives the clamping half tubes to swing so as to drive the test tube to swing. The formaldehyde detector has the effect of accelerating the reaction speed of the reaction liquid and the color developing agent so as to acce