Abstract The photodissociation dynamics of cyanamide have been investigated. Laser-induced fluorescence (LIF) was used to study the formation of CN(X2∑+) radical in the photodissociation at. 193 nm. A very weak LIF signal from the CN(X) radical was detected at a laser intensity of 0.35 mJ/pulse and the rotational temperature is 1590±90 K. When the laser intensity is high, the LIF signal increased obviously and the population in the ν"= 2 level was observed. The absorption cross section we measured at 193 nm is less than 2.4±10-19cm2 at a temperature of 50℃. A secondary photolysis mechanism can be used to explain the experimental results.