One year ago i have applied for tourist and student visa to Spain and got refused. Now i got a chance to visit Poland. Can i re-apply for a tourist visa? Will it get refused because of my previous rejection?
A previous visa rejection does not in itself disqualify you from obtaining a visa later, but information from an earlier visa application, successful or not, may be used against you.
For a more specific answer, please provide more information, especially about the reason for the rejection.
Based on your comment with additional information:
The main issue seems to be your situation in your home country. The authorities want to be convinced that you have something to which you want to return. If you have a well-paid job, run a successful business or own a nice house you may seem more likely to go back home rather than trying to leave your old life behind and remain in the Schengen States. Other factors like nationality, age, education and family situation may also be taken into account, when assessing the risk of you overstaying.
It does seem that the authorities also found your travel arrangements improbable in some way. This did not help you, but might not have been an issue if otherwise would have seemed very likely to return home in time.
The good news: Your previous rejected applications will likely not prevent you from getting a visa if you can address the reasons.
The bad news: It may be very difficult for you to convince the authorities that you have strong reasons to go back home. They want to see strong ties to your home country, which may not be easy to create. Have your economy improved since last time? Have you got a new job? Is your family situation different?