In th is paper, the con ten t of phenacet in in compound tab let s of A sp irin, A n tongding and Keganm ing w ere determ ined in hydrogen ch lo ride acid by spect ropho tom et ry w ithou t any p relim inary separat ion. The po tassiun dich rom ate (0.1molL/L)w as adop ted as co llo r reagen t. The average recoverys and relat ive standard deviat ion s of compound A sp irin, A n tongding and Keganm ing tab let s are 100.6%, 0.355%, 100.1%, 0.263%, 99.27%, 0.598%, respect ively. Th is m ethod is simp le, rap id and w ith sat isfacto ry resu lt s.