Polymers are a kind of attractive hosts for laser dyes with advantages such as superior optical homogeneity, high transparency in pumping and lasing range, good chemical compatibility with organic dyes, easy control of the chemical process, low cost, and so on. PM567-doped solid dye samples based on copolymer of methyl methacrylate (MMA) with 2-hydroxyethyl methacrylate (HEMA) were prepared. The influence of the volume percentage of HEMA on the properties of solid dye samples was studied. Pumping the samples longitudinally with the second harmonic generation (SHG) of Q-switched Nd:YAG laser at the pulse rate of 10 Hz, the output properties were studied. The lasing threshold was lower than 10 mJ/cm2. There was an optimal volume ratio of MMA to HEMA for the highest slope efficiency. And the highest efficiency 56.2% was obtained in the sample with volume ratio 1:1. The photostability of samples was studied through pumping the samples by 17.5 mJ/pulse (the fluence was 0.02 J/cm2) at 10 Hz repetition rate. The useful lifetime of 123000 shots was obtained before the output fell to half of its initial value, and normalized stability was 10.8 GJ/mol.